Building regulations for extensions in Renfrewshire and Inverclyde
We prepare the building warrant for extensions for homes across Renfrewshire and Inverclyde, on their own or as the first stage of a full design and build project.
- Guide priceFrom £850 inc VAT
- Approval routeBuilding warrant before work starts
- Towns covered7
- Site visitFree, no obligation

Planning rules that apply in Renfrewshire and Inverclyde
In Scotland a building warrant from the council is needed before work starts on almost any extension, and a completion certificate is issued when the work is accepted. Building standards are set in the Scottish technical handbooks.
The planning position for a specific Renfrewshire and Inverclyde address depends on its history and any designations, which is why we check it at the first visit.
Scotland has no Party Wall Act. Where work affects a shared wall or a neighbour's land, we agree access, protection and making good with your neighbour in writing before work starts.
Applications are decided by your council as planning authority.
Design and approval fees for Renfrewshire and Inverclyde
Fees below are our Renfrewshire and Inverclyde guide (×0.98, the Scotland factor), including VAT. Council and building control fees are extra.
| Option | What it covers | Guide price |
|---|---|---|
| Essential | Building regulations drawings for a simple single-storey extension | £850 – £1,800 |
| Standard | Drawings plus structural calculations | £1,250 – £2,550 |
| Premium | Complex or two-storey pack with energy calculations | £2,150 – £3,750 |
Our design fee only. Building control charges are set by your council (or, in England and Wales, a registered building control approver) and quoted separately.Council fees are extra and are set by the Scottish Government.
Want a range for your exact size? The guide-price tool takes about a minute.
What we take care of
- Completion certificate on sign-off
- Inspection bookings throughout the build
- Energy and glazing checks, including whole-house calculations if needed
- Building regulations drawings and written specification
- Structural calculations for beams, lintels and foundations
Working in Renfrewshire and Inverclyde
Towns we cover in Renfrewshire and Inverclyde include Paisley, Greenock, Newton Mearns, Renfrew, Barrhead, Johnstone, Erskine. Scotland's housing includes sandstone villas, terraces and tenements in the cities and plenty of post-war and modern houses and bungalows elsewhere. A building warrant is needed before work starts.
What happens next
Site visits are free and there is no obligation. Where drawings are needed, the design stage is priced in writing before it starts.
Free site visit
A designer visits, takes measurements and photos, and discusses layouts, budget and timing with you.
Design and approvals
Drawings are prepared and agreed with you, then submitted for the right planning route and building regulations approval.
Fixed written price
With the design and specification agreed, you get a fixed written price and a start date.
Build and sign-off
Work is carried out to the agreed programme, inspected by building control and signed off at the end.
Common questions in Renfrewshire and Inverclyde
Do you cover all of Renfrewshire and Inverclyde?
Yes, across the whole of Renfrewshire and Inverclyde. Site visits are free and there is no obligation.
Who do I contract with in Renfrewshire and Inverclyde?
Your contract is with S&K Property Investments and Improvement Ltd, which designs and manages the project and the build teams who carry it out.
How long does this take for a Renfrewshire and Inverclyde home?
2–5 weeks for drawings, depending on the council and the complexity of the project.
Book a free site visit in Renfrewshire and Inverclyde
We will measure up, check the planning position and give you honest guide figures.
- Free, no-obligation site visit
- Planning route checked before you spend on drawings
- Written price once the design is agreed
- Building control sign-off at the end
Prefer to talk? Call 0800 088 6341 or .
Book a free site visit
Tell us a little about the project and we will arrange a time.